Apparatus for making raceway-walls for bearings.



I. A. GEORGE. APPARATUS FOR MAKING RACEWAY WALLS FOR BEARINGS.

APPLLCATION FILED SEPT. 20, I913.

Patented May 18, 1915.

Z1 OFFIE.

ISAAC A. GEORGE, or HAMILTON, OHIO.

APPARATUS FOR MAKING RACEWAY-WALLS FOB BEARINGS.

Specification of Letters Patent.

Patented May 18, 1915.

Original application filed October 17, 1912, Serial No. 726,291. Divided and this application filed September 20, 1913. Serial No. 790,839.

To all whom it may concern Be it'known that I, ISAAC A. GEORGE, .citizen of the United States, residing at Hamilton, in.the county of Butler and State of Ohio, have invented a certain new and useful Improvement in Apparatus for Making Raceway-VValls for Bearings, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to the formation of roller bearings employing race-way walls having tapering bores and cylindrical exteriors. It has hitherto been the practice to make such race-way walls in lathes.

It is the object of my invention to provide a machine for producing such race-way walls by press'work, my present invention being a division of my original a plication' Serial No. 726,291, filed October 1 1912, in which the method herein disclosed claimed.

I will explain my invention fully by reference to the accompanying drawing showing the preferredembodiment of the structure thereof and in which Figure 1 is a sectional elevation showing punch and die members that are employed to perform one step in the operation, the work upon which these members operate being also indicated in section; Fig. 2 is a view in sectional elevation showing another set of punch and die members for performing the final step in the operation, the work upon which these die members operate being also shown in section; Fig. 3 is a view in elevation of the product; and Fig. 4 isa sectional view of the product.

Like parts are indicated by similar characters of reference throughout the different figures.

The structure shown in Figs. 3 and 4 is preferably made out of a disk blank 1 (Fig. 1.) usually of a thick sheet of iron or steel sufliciently malleable or ductile for the purpose, it being possible to carbonize the product and thereby further adapt it to the hard service to which it is to be subject.

ring 2 which rests upon the die 3. This die has a bore, the upper portion of whose wall is inwardly convexed as indicated at 4, the preferred curvature being a French The disk of proper thickness is received within} the circular space aii'orded by the bore of a curve. The disk 1 initially rests upon the die 3 at the larger end of the bore of this die as indicated by dotted lines, the punch 5 being initially withdrawn to permit of such location of the disk 1 when flat. The portion of the punch 5 which has a shaping influence upon the blank is preferably substantially cylindrical and this portion is provided at its lower periphery with a sharp circular cutting edge for removing the bottom of the disk which is formed during the downward movement of the punch. The shearing ring 6, constituting in effect a part of the die 3, has a circular shearing edge cooperating with the aforesaid cutting or shearing edge of the punch for the purpose of removing the bottom of the temporarily formed dish. The punch anddie are of such formation that the wall of the dish increases in thickness from the bottom to the top, the punch and die cooperating to upset the metal of the disk for this purpose. The insetting convex portion -1 of the bore of the die 3 properly directs the curvature of the disk 1 and in a manner to prevent the metal of this disk from being wrinkled. The punch is provided with a forming shoulder 7 for the purpose of thinning the thickened upper portion of the dish to be slightly thinner than the original thickness of the disk whereby the annular recess 8 is provided in the final product 9, that which is to becomethe final product being indicated at 10 in Fig. 1. After the punch 5 and die 3 have operated upon the work a ring is produced having a substantially cylindrical bore and which flares upwardly and outwardly when positioned as indicated in Fig. 1, the lower peripheral corner of the ring being preferably curved. A ring thus produced is of a shape most advantageously to be operated upon in the next and last step of the process but it is to be understood that I do not limit myself to the step illustrated and described in connection with Fig. 1 as rings of other shapes than that illustrated in Fig. 1 may be operated upon to produce the final product.

Assuming that the ring as shaped in Fig. 1 is to be employed, such ring (having expanded slightly at its top) is inverted and rested upon the die ll-in the position indicated by dotted lines in Fig. 2, the lower part of the curvedportion 12 of the die initially engaging the ring. The punch 13 that illustrated the lower portion of the bore of the die 11 is cylindrical to conform to the exterior of the race-way wall and the punch is provided with a tapered portion 14 to correspond with the taper of the tapered bore of the race-way wall. The tapered bore of the race-way wall may be provided with a cylindrical continuation as indicated at 15 in Fig. 4: in which event the punch 13 terminates at its lower end in a cylindrical extension 16 conforming in depth to the depth of the bore portion 15. The die 11 desirably has a central seat 17 having an annular groove for shaping the portion 18 of the ring, the punch 13 being brought substantially to rest upon this seat whereby a substantially closed annular space is finally formed in which the metal of the ring blank (which is of a quantity, when properly distributed, to fill this space) is distributed to produce a race-way wall of a cross section which is determined by the shape of this substantially closed annular space. The punch 13 has a peripheral shoulder or over hanging portion 19 that projects beyond the tapered portion 14: of the punch, this overhanging portion taking part in pressing the ring into final position and also taking part in forcing the metal of the ring into its final shape.

While I have'herein shown and particularly,described one form of mechanism for producing the product, I do not wish to be limited to the precise details set forth, but having thus described my invention I claim as new and desire to secure by Letters Patent the following 1 1*. A structure for producing race-way walls for bearings of external cylindrical formation and having tapering bores including a die having a cylindrical boreportion conformingto the external formation of the race-way wall to be formed, and a punch having a tapering portion corresponding to the bore of the race-way wall to be formed bore of the die, said punch also havinga portion overhanging its tapering portion, these portions of the punch and die cooperating to work upon a ring interposed between the punch and die to effect the flow of metal thereof into the desired shape for the raceway wall.

3. A structure for producing race-Way walls for bearings of external cylindrical formation and having tapering bores including a die having a cylindrical bore portion conforming to the external formation of the race-way wall to be formed and receivable within the cylindrical bore of the die, this die having a seat taking part in determining the shape of the race-way Wall, and a punch having a tapering portion corresponding to the bore of the race-way wall to be formed, the punch and die cooperating to work upon a ring interposed therebetween to effect the flow of metal thereof into the desired shape for the race-way wall, the end of the punch being adapted to be brought substantially to rest within the die Seat.

4. A structure for producing race-way walls for bearings of external cylindrical formation and having tapering bores including a (lie having a cylindrical bore portion conforming to the external formation of the race-way wall to be formed, this die having a seat taking part in determining the shape of the race-way wall, and a punch having a tapering portion corresponding to the bore of the race-way wall to be formed, and receivable within the cylindrical bore of the die, said punch also having a portion overhanging its tapering portion, these portions of the punch and die cooperating to work upon a ring interposed between the punch and die to effect the flow of metal thereof into the desired shape for the race-way wall, the end of the punch being adapted 'to be brought substantially to rest within the die seat.

5. A structure for producing race-way walls for bearings of external cylindrical formation and havingtapering bores including a die having a cylindrical bore portion conforming to the external formation of the race-way wall to be formed, and a punch having a tapering portion corresponding to the bore of the race-way wall to be formed and receivable within the cylindrical bore of the die, said punch terminating in a substantially cylindrical extension merging with the tapered portion of the punch, the punch and die cooperating to work upon a ring interposed therebetween to effect the flow of metal thereof intpl the desired shape for the race-way wa -6. A. structure for producing race- Way walls for bearings'of external cylindrical 7 formation and having tapering bores including a die havlng a cylindrical bore portion conforming to the external formation of the race-Way Wall to be formed, and a punch having a tapering portion corresponding to the bore of the race-Way Wall to be formed and receivable Within the cylindrical bore of the die, said punch terminating in a substantially cylindrical extension merging with the tapered portion of the punch, said punch also having a portion overhanging its tapering portion, these portions of the punch and die cooperating to work upon a ring interposed between the punch and die to effect the flow of metal thereof into the desired shape for the raceway wall.

7. A structure for producing race-Way walls for bearings of external cylindrical formation and having tapering bores including a die having a cylindrical bore portion conforming to the external formation of the race-way wall to be formed and receivable within the cylindrical bore of the die, this die having a seat taking part in determining the shape of the race-Way Wall, and a punch having a tapering portion corresponding to the bore of the race-Way Wall to be formed, said punch terminating in a substantially cylindrical extension merging with the tapered portion of the punch, the

'punch and die cooperating to Work upon a ring interposed therebetween to'eflect thefiow of metal thereof into the desired shape for the race-Way Wall, the end of the punch being adapted to be brought substantially to rest within the die seat.

8. A structure for producing race-Way walls for bearings of external cylindrical formation and having tapering bores including a die having a cylindrical bore portion conforming to the external formation of the race-way wall to be formed and receivable Within the cylindrical bore of the die, this die having a seat taking part in determining the shape of the race-Way Wall, and a punch having a tapering portion corresponding to the bore of the race-Way Wall to be formed, said punch terminating in a substantially cylindrical extension merging with the tapered portion of the punch, said punch also having a portion overhanging its tapering portion, these portions of the punch and die cooperating to Work upon a ring interposed between the punch and die to effect the flow of metal thereof into the desired shape for the race-way Wall, the end of the punch being adapted to be brought substantially to rest Within the die seat.

- In Witness whereof, I hereunto subscribe my name this 9 day of September A. D.,

ISAAC A. GEORGE. Witnesses:

SAM D. FI'r'roN, Jr., E. F. VVARNDORF. 

